Question

The following program is written to calculate the addition for two numbers (9,3).  Unfortunately, the program has Compile-time and Run-time errors that prevent the program from running and producing the correct result. Using the Table 2.1 below, allocate the error(s) on each program line.

1. // define new class
2. publicCalculation {

3. privateintresult_add
4. // define add method to add two numbers
5. publicvoidadd(intfirst_number,intsecond_number) {
6. int   number1= first_number;
7. doublenumber2= second_number;
8. result_add= number1/number2;

9. }
10. / return the value
11. publicintgetvalue()
12. {
13. returnresult_add;
14. }
15. publicstaticvoidmain(String[] args) {
16. // define new object with name summation

17. Calculation summation= Calculation();
18. summation.add(9,3);

19. intresult= getvalue();
20. System.println(result);

21. }

22. }

23. }

Answer 1

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Below are the errors:

• Clas keyword missing at the first line that is public class Calculation
• In method as two parameters of integer type are passed and in the definition for second_number double type is used hence on the line result_add= number1/number2; getting error hence need to change this.
• Alson on the same line needs to used + operator instead of /
• On the line Calculation summation= Calculation(); fore creating object new keyword is missing
• getvalue() needs to be called using object name that is summation
• System.println(result); line missing keyword out
• At the last line } is needs to be removed.

Demonstration :

Here a new java program with name "Calculation.java" is created, which contains following code.
Calculation.java :

// define new class
public class Calculation {
   private int result_add;

// define add method to add two numbers
   public void add(int first_number, int second_number) {
       int number1 = first_number;
       int number2 = second_number;
       result_add = number1+ number2;
   }

//return the value
   public int getvalue() {
       return result_add;
   }

//entry point of program ,main method
   public static void main(String[] args) {
// define new object with name summation
       Calculation summation = new Calculation();
       summation.add(9, 3);
       int result = summation.getvalue();
       System.out.println(result);
   }
}

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Output : Compile and Run Calculation.java to get the screen as shown below

Screen 1 :Calculation.java

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.